Seamless Precision Steel Tubes DIN 2391 St35 St45 Cold Drawn Cold Rolled Pipe
Seamless Precision Steel Tubes DIN 2391 St35 St45 Cold Drawn Cold Rolled Pipe
Main steel grades: St 35, St 45, St 52
Application: apply to the Precision steel tubes used.autos, machinery, oil cylinders, motorcycle shock absorbers, and the inner cylinders of auto shock absorbers.
Chemical Requirements & Mechanical Proterties:
| Grade | Chemical Composition (%): | ||||
| C max | Si max | Mn | P max | S max | |
| St 35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 52 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
Steel grade |
BK | BKW | BKS | GBK | NBK | |||||||
| RmN/mm min |
min | RmN/mm min |
min | N/mm min |
ReH N/mm min |
min | N/mm min |
min | N/mm min |
ReH N/mm min |
min | |
| St35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340-470 | 235 | 25 |
| St45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 235 | 21 |
| St52 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490-630 | 355 | 22 |
Mark: As required.
Inspection and Test: chemical composition test, mechanical properties test(tensile, yield, elongation), process properties test(flatting, flaring, bending, hardness, impact, etc.), appearance and size test, non-destructive inspection test, hydrostastic test.
Delivery status: Annealed, normalized, normalized+Tempered, etc.
End: plain end, beveled end, threaded
End protection: plastic caps
Outside coating: black painting, anti-corrosion oil,galvanized finish, finish as per customer requirements.
Packing: Exporting package/wooden box /as requirement.
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